2D kernel initial wiring for Guassian

src/effects/SkMatrixConvolutionImageFilter.cpp

 /*
  * Copyright 2012 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkMatrixConvolutionImageFilter.h"
 #include "SkBitmap.h"
 #include "SkColorPriv.h"
@@ skipping 331 matching lines @@
     }
     SkASSERT(fKernelSize.width() * fKernelSize.height() <= MAX_KERNEL_SIZE);
     *effect = GrMatrixConvolutionEffect::Create(texture,
                                                 bounds,
                                                 fKernelSize,
                                                 fKernel,
                                                 fGain,
                                                 fBias,
                                                 fKernelOffset,
                                                 convert_tilemodes(fTileMode),
-                                                fConvolveAlpha);
+                                                fConvolveAlpha,
+                                                true);
     return true;
 }
 #endif